I've got over 400rwhp from a set of standard R33 GTS-t injectors, running 45psi of fuel pressure with a Malpassi rise rate regulator. It has alot of do with engine management:D
Hi Tim, No easy way to check with a multimeter, best way is to take a working one and swap it in. Series II coil-packs are different than series I as they have the igniter inbuilt.